Method of producing constructional material



Patented Dec. 29, 1931 was 3' ALBERT C. FISCHER, OF CHICAGO, TLLINOTS ASSIGNOB) TO THE PHILIP CAREY MANU- FACTURENG COMPANY, A .CQRPORATION OF OHIO METHOD PRODUCING CONSTRUCTIONAL MATERIAL N0 Drawing.

This invention relates to incorporating fibrous material in bituminous with suitable mixing contrivances and extruding the mixture in a. suitable extruding machine, readily known to the art as a simplified aractice of preparing fibre content premoulded expansion joints and other constructional material.

The bituminous material and fibrous matter is prepared in a suitable mechanical mixer, steam acketed, and the mass conveyed to the chamber of the extruding machine adapted for the purpose, and the warm, fibrated mass extruded into fiat premoulded strips of expansion joint. The mechanical mixersare those readily known to the art, and the extruding contrivances are those known to the art.

The purpose of my invention is to facilitate the economical production of premoulded expansion joints by bringing about a mixture of the bituminous material and fibrous material in a crisscross condition. 7

Usually when a mass of fibrated material is introduced between rolls, a flow is set up and the fibrous matter lays itself out in the direction of the flow, thus establishing a grain which is stronger longitudinally than it is crosswise. My invention contemplates the inter-mixture of these materials in a suitable mechanical mixer and extruding same in a suitable contrivance, thus forcing it out in a compressed state, which will not permit the fibrous material and bituminous material to set up a flow, and the fibrous material will, therefore, be incorporated in an interlaced and intertwined, crisscross condition rather than in agrain-like formation. This will produce a premoulded expansion joint which is strong in a vertical direction as well as in a horizontal direction.

Attention is particularly directed to the fact that to develop the structure as above ex plained it is necessary to use fibrous material of relatively long linear dimension, as dismaterial Application filed. December .26, 1925. Serial No. 77,684.

tinguished from finely divided fibrous material, such as comminuted wood, or any other commmuted material which generally speaking has no definite length.

speak of relatively long fibrous realize that there must necessarily be a limit When I material T 50 as to the length of the material used, as if the fibrous mat rial 18 too long considerable difficulty will be experienced in extruding the mixture. On the other hand, as heretofore explained, I am desirous of developing inter: twlned crisscross formation of the fibre content, and this can only be realized with fibrous material of a length to enable the same to function in this'respect. There is no 0bjecno tion to the length of the material, so long as the extruding apparatus will accommodate. In fact I would prefer to use as long lengths as possible. as comminuted Wood, or any minutedrnaterial is, of course,

Finely divided materials, such other comentirely out of the questionso far as developing crisscross formation of the fibre content is con- 'cerned. As an example of the material that I could use I will refer to excelsior.

course in some instances it may be necessary to chop the excelsior into shorter lengthsthan that offered to the trade.

I claim:

1. The herein described method of fabricating preformed strips of elastic and resilient constructional material reenforced with linear fibers incorporated therewith in intertwined crisscross formation, which consists in mixing predetermined quantities of bituminous material and relatively long fibers,

and thereafter extruding the mixture into strips of the desired dimension.

2. The herein described method of fabrieating preformed strips of elastic and resilientconstructional material reenforced with a fibre content incorporated therewith in intertwined crisscross formation,

which consists in heating bituminous material and reducing the same to a consistency to permit of 9 it being thoroughly mixed with a quantity of fibers, adding fibrous material of relatively long linear dimension to the bituminous material, thoroughly mixing said materials and finally subjecting the materials to the action of an extruding apparatus to thereby extrude the material into constructional material of the desired dimension.

3. The herein described method of fabricating preformed strips of elastic and resilient constructional material reenforced with a fibre content incorporated therewith in intertwined crisscross formation, which consists in heating and thoroughly mixing bituminous material and relatively long fibers and immediately after said mixing step has been completed, extruding the mixture into constructional material of the desired dimension.

4. The herein described method of fabrieating preformed strips of elastic and resilient expansion joint material reenforced with linear fibers incorporated therewith in intertwined crisscross formation, which consists in mixing predetermined quantities of bituminous material and relatively long fibers, and thereafter extruding the mixture into strips of the desired dimension.

5. The herein described m'ethodof fabrieating preformed strips of elastic and resilient expansion joint material reenforced with a fiber content incorporated therewith in intertwined crisscross formation, which consists in heating bituminous material and reducing the same to a consistency to permit of it being thoroughly mixed with fibrous material, adding a quantity of fibers of relatively long linear dimension to the bituminous material, thoroughly mixing said ma terials and finally subjecting the materials to the action of an extruding apparatus to thereby extrude the material into strips of the desired dimension.

6. The herein described method of fabrieating preformed strips of elastic and resilient expansion joint material reenforced with a fiber content incorporated therewith in intertwined crisscross formation, which consists in heating and thoroughly mixing bituminous material and relatively long fibers, and immediately after said mixing step has been completed, extruding the mixture into expansion joint material of the desired dimension.

7. The herein described method of forming preformed strips of constructional material reenforced with linear fibers incorporated therewith in intertwined crisscross formation, which consists in mixing predetermined quantities of bituminous material and relatively long fibers, and thereafter extruding the mixture into strips of the desired dimension.

8. The herein described method of form'- ing preformed strips of constructional ma- 

